Failure analysis of EHV transformers

Failure activity of different samples of AEP extra high voltage (EHV) transformers is analyzed using estimations of the time-dependent failure rate. This analysis can be applied to investigation of the failure mechanism of 765 kV transformers. A novel method for the probabilistic estimation of the number of future failures is introduced. Results are compared with those of traditional computations of the number of future failures conducted using different average failure-rate approaches.<
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